Tyranny of the Sun is a prophecy foretold in the Elder Scrolls by Arch-Curate Vyrthur, who became a vampire in the early First Era. Vyrthur wanted revenge on Auri-El for turning away from him. The prophecy is written between three separate Elder Scrolls. The inscription denotes a ritual that requires a Daughter of Coldharbour as a sacrifice and the bow of Auri-El to permanently purge the world of sunlight, allowing vampires to roam unhindered.
Origins during the Merethic EraEdit
Arch-Curate Vyrthur, who is one of the last surviving Snow Elves, became a vampire around the time the Atmorans claimed Skyrim for themselves. He felt betrayed that Auri-El would let it happen to him. He wrote a prophecy to get revenge on Auri-El in the form of blocking out the sun for eternity.
During the Dawnguard questline, the Volkihar Vampires are terrorizing the people of Skyrim, impeded only by the sunlight. Lord Harkon, leader of the Volkihar, found traces of a prophecy to blot out the sun. Harkon dispatched his daughter, Serana, to track down the Elder Scroll containing the ritual. During her mission, Serana was entombed within a sarcophagus with an Elder Scroll, unable to return to her father. A member of the Dawnguard, who might have been the Dragonborn, discovered her. If the member joined the Volkihar, the Dragonborn collects the relics necessary to perform the ritual.
According to the Elder Scrolls, the items required are the Bow of Auri-El and the blood of a Daughter of Coldharbour. After collecting the bow, a blood-stained arrow must be shot into the sun, causing a mysterious energy to block out its rays. This energy, however, is only lasts during daylight hours, which are 5:00 AM - 7:00 PM.
Origin of ritual itemsEdit
The items needed for the ritual were that of ancient times. Molag Bal, patron of vampires, bestowed the gift of vampirism directly upon his worshipers. Another ritual was conducted on females; the survivors were called "Daughters of Coldharbour". The gift of Vampirism from Molag-Bal was the strongest and most potent. Therefore, the strongest vampires were created from this.
The Bow of Auri-El was said to be used by Auri-El himself and had the power of the sun at its disposal. This weapon is believed to be mer in construction, due to their spiritual affiliation with the Auri-El.
- The Elder Scrolls V: Dawnguard (First appearance)